Evidence For Cortical Specialization And Cortical Plasticity In Early Human Language Development Professor Dan Levitin’s Class, April 3, 2001 Laura Ann Petitto McGill University Department of Psychology & McDonnell-Pew Cognitive Neuroscience Centre McConnell Brain Imaging Centre Montreal Neurological Institute FUNDING: NSERC, MRC, SSHRC, McDonnell-Pew Foundation Guggenheim Foundation, Spencer Foundation
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Evidence For Cortical Specialization And Cortical Plasticity In Early Human Language Development Professor Dan Levitin’s Class, April 3, 2001 Laura Ann.
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Evidence For Cortical Specialization And Cortical
Plasticity In Early Human Language Development
Professor Dan Levitin’s Class, April 3, 2001
Laura Ann Petitto McGill University Department of Psychology &
McDonnell-Pew Cognitive Neuroscience Centre
McConnell Brain Imaging Centre
Montreal Neurological Institute
FUNDING: NSERC, MRC, SSHRC, McDonnell-Pew Foundation
Guggenheim Foundation, Spencer Foundation
BEHAVIORAL LEVELWHAT WE KNOW
Birth 12 MonthsBirth 12 Months
NEURAL LEVELWHAT WE KNOW
BEHAVIORAL & NEURAL WHAT’S THE LINK?
What brain mechanisms underlie the infant’s ability to acquire language?
What components of the environment are most critical?
What is the neural basis for Language...
Sound vs Patterns?
PREVAILING ASSUMPTIONSpeech or Sound is
Critical to
Language
Acquisition
& its’
Cerebral organization
PREVAILING ASSUMPTION
Speech modality set before birthSpeech modality set before birth
TESTING SPEECH-BASED THEORIES
NEW ANSWERS FROM STUDY OF SIGNED LANGUAGES
Brain is set for specific patterns found in
Natural Language
NOT speech
Modality is set after birth
NOT before birth
Mechanism is an interaction of
Perceptual, Neural Substrates dedicated to aspects of Natural Language patterning & Motor